The full explanation from Namco's Comte, who's company is publishing Test Drive Unlimited 2 and The Witcher 2, goes a little something like this:

I will be very honest. I think it's a good [approach] for one reason: I have no alternative today. Is the best one? Certainly not but as of today if I can make something else I'll do it, but it's better to do something than not do something.

Surprisingly, Comte also admits that regardless of the DRM system is utilized, "it'll be cracked in Russia... two hours before putting it out." Seems like a good reason to punish paying customers. I cannot say for sure, but perhaps Namco Bandai will face some backlash for backing Ubisoft on this one.

This shouldn't serve as a confirmation of always-on DRM for the two games mentioned, but it seems likely. Console versions of both titles will also be released.